import 'package:flutter/material.dart';

void main(){
  runApp(MaterialApp(
      title:'导航演示1',
      home:new FirstScreen()
  ));
}

class FirstScreen extends StatelessWidget{
  @override
  Widget build(BuildContext context){
    return new Scaffold(
        appBar: AppBar(title:Text('导航页面')),
        body:Center(
            child:RaisedButton(
              child:Text('查看商品详情页面'),
              onPressed: (){
                Navigator.push(context,new MaterialPageRoute(
                    builder:(context) => new SecondScreen())
                );
              },
            )
        )
    );
  }
}

class SecondScreen extends StatelessWidget{
  @override
  Widget build(BuildContext context){
    return Scaffold(
        appBar:AppBar(title:Text('技术胖商品详情页')),
        body:Center(child:RaisedButton(
            child:RaisedButton(
              child:Text('返回'),
              onPressed: (){
                Navigator.pop(context);
              },
            )
        ))
    );

  }
}